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KARTAL, İLYAS

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KARTAL

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İLYAS

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2023 - 20243
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    PublicationOpen Access
    Sustainable fabric printing by using pre-consumed cellulosic textile wastes: The effect of waste particle content
    (2024-04-05) YILDIZ, ZEHRA; KARTAL, İLYAS; KOÇAK, EMİNE DİLARA; ERYILMAZ, OĞUZ; YILDIZ Z., KARTAL İ., KOÇAK E. D., Ozer B., Kus B. N., ERYILMAZ O.
    The textile industry generates significant amounts of waste, including yarn/fiber fluffs, fabric scraps, offcuts, etc. These wastes can be recycled and repurposed for usage in screen printing which is a versatile and cost-effective printing technique by producing high-quality prints. In this study, pre-consumed colored cotton wastes were milled into 30–70 μm particle size by using a miller. Then the colored waste particles were included in a commercial printing paste and applied on cotton fabrics via screen printing. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) analysis, and energy dispersive spectrometer (EDS) were employed to observe the chemical changes in the printed textile fabrics. The printed fabrics were evaluated through color, wash/rub fastness, tensile strength, surface wettability, tactile, and air permeability properties. The dispersion quality of the waste particles on textile fabrics was observed by using light microscopy and scanning electron microscopy (SEM) images. The overall results demonstrate that a 10% amount of waste fibrous particle inclusion to the printing paste gave optimum results by means of dispersion quality of wastes, air permeability, and handle properties. Above 10% waste amounts, the waste particles cannot be dissipated well on the fabric surface, resulting in agglomerated and non-uniform printed areas. These findings hold substantial potential for promoting sustainable coloring applications by using colored pre-consumed textile wastes within the textile industry while maintaining high-quality fabric products.
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    PublicationOpen Access
    Mechanical and thermal properties of fumed silica-incorporated silane-terminated urethane/epoxy-interpenetrating polymer network nanocomposites
    (2024-01-01) AKIN, EMRE; ÇAKIR, MUSTAFA; KARTAL, İLYAS; AKIN E., ÇAKIR M., KARTAL İ.
    In this study, it was aimed to improve the mechanical and thermal properties of epoxy materials based on diglycidyl ether of bisphenol-A-based. For this purpose, three different nanocomposite materials were prepared at various ratios including a fumed silica nanoparticle-reinforced epoxy nanocomposite (FSN), an epoxy/silane-terminated urethane (STU) hybrid interpenetrating polymer network (IPN) nanocomposite (SHIN), and a fumed silica-reinforced epoxy/STU hybrid IPN nanocomposite (FSHIN). While synthesizing SHIN, 3-isocyanato propyl trimethoxy silane (ICPTMS) and poly (hexamethylene carbonate) diol were used. The synthesized STU polymer chains were crosslinked by reacting them with TEOS via the sol–gel process. Therefore, hybrid networks were obtained. Moreover, fumed silica nanoparticles were incorporated into the hybrid networks via the sol–gel process for FSHINs. The three different nanocomposite materials exhibited much more improved properties than the neat epoxy. The most prominent nanocomposite was FSHIN. In comparison with the neat epoxy, Young\"s modulus, ultimate tensile strength, and Izod impact resistance values increased at ratios of 53%, 50%, and 223%, respectively. Glass transition temperature values and char yield values increased substantially in all nanocomposites. However, thermal decomposition temperatures increased only for FSNs. Moreover, these values for FSHINs that were very close to those of the neat epoxy were considerably higher than those of SHINs. Highlights: Fumed silica-incorporated silane-terminated urethane/epoxy IPN nanocomposites. Substantially improved mechanical properties and impact resistance. Improved thermal stability.
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    PublicationOpen Access
    Fabrication and characterization of hazelnut shell powders-loaded poly (lactic acid) (PLA) composite fibers
    (2023-10-01) KARTAL, İLYAS; KARTAL İ., Sengor I.
    In this research, fibers were obtained by adding hazelnut shell powders which are a natural filler material (HSP) at different concentrations into Poly (lactic acid) (PLA) by using the electrospinning method, which is the most common method to obtain fibers. Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), tensile strength measurement, and physical analysis such as density, surface tension, viscosity, electrical conductivity test was performed after the fiber production process. The results obtained from this study, fibers showed beadles and smooth surfaces. The diameter distribution of these fibers was observed at 2092 µm without hazelnut shell powder. HSP was added to the composites (ϕ=2379,64±635,268 µm for b; ϕ=25581000,339±,806 µm for c; ϕ=2619,24±967,364µm) and diameters were increased. This result had shown, that by increasing the HSP proportion in the PLA/HSP solution, the average diameters of the fibers were increased. The tensile strength of the fibers decreased between the s1-s4 specimens. It has been shown that the tensile strength decreases as the diameter increases. The resulting structures of the fibers possessed antiseptic properties, which are attractive for many biomedical applications.